Pls help installing back up battery for alarm

lilspeedy626

New Member
5+ Year Member
The insturictions on the backup battery say I am adding a (520T) Battery extender to my Viper 791 autostart and I need some help. The extender is made by DEI and I have figured everything out except one wire:

I dont know what wire on the viper 791 is the "(-) Instant trigger input" any ideas? The install instructions define the wire as follows:

"The (-) trigger output. Connect this wire to the (-) instant trigger input of the security system. This wire will send a (-) signal if the vehicle's battery is disconnected, triggering the security system"

Any ideas? Thanks!
 




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